*{
    margin: 0;
    padding: 0;
}
a{
    text-decoration: none;
}
span:hover{
    color: red;
}
.nav{
    width: 100%;
    height: 80px;
    position: sticky;
    top: 0;
    /* 悬浮在最上方 */
    z-index: 10;
    background-image: linear-gradient(rgba(0, 0, 0, 0.527), rgba(255, 255, 255, 0));
}
/* 导航栏开始*/
.logo{
    width: 62px;
    height: 80px;  
    background: url(../img/logo.png);
    float: left;
    margin-left: 10%;
}
.nav ul li{
    width: 10%;
    height: 80px;
    float: left;
    border-radius: 10px;
    list-style-type: none;
    text-align: center;
    margin-left: 2%;
    background-color: transparent;
}
.nav ul li a{
    text-decoration: none;
    color: rgba(255, 255, 255, 0.733);
    display: block;
    /* 跟随父元素高度 */
    height: inherit;
    line-height: 80px;
}
.nav ul li:hover{
    /* background-color: rgba(175, 42, 60, 0.534); */
    background-image: linear-gradient(rgba(0, 0, 0, 0.527), rgba(255, 255, 255, 0));
}
/* ------------------导航栏结束 ------------*/
/* 轮播图开始 */
.bc{
    font-family: 楷体;
    color: red;
    font-size: 90px;
    height: 940px;
    width: 100%;
    background-color: rgba(0, 113, 179, 0.199);
}
.bc .lbt {
    position: relative;
    margin: 0px   auto;
    width: 90%;
    height: 810px;
    background-image: url(../img/lb1.jpg);
    animation: 30s lbt infinite;
    border-radius: 40px;
}
@keyframes lbt {
    0%{background-image: url(../img/lb1.jpg);}
    20%{background-image: url(../img/lb2.jpg);}
    40%{background-image: url(../img/lb3.jpg);}
    60%{background-image: url(../img/lb4.jpg);}
    80%{background-image: url(../img/lb5.jpg);}
    100%{background-image: url(../img/lb6.jpg);}
    
}
/* 轮播图结束 */
/* 风景图 */
.btn1,.btn2,.btn3,.btn4{
    display: block;
    width: 25%;
    height: 43px;
    float: left;
    text-align: center;
    line-height: 43px;
    font-size: 40px;
    font-family: "楷体";
    background-color: skyblue;
    font-weight: bold;
}
.fjt{
    margin: 0 auto;
    width: 90%;
    height: 625px;
}
.fmh_pic{   
    width: 900px;
    height:625px;
    background-image: url(../img/hu.jpg);
    float: left;
    transition: 1s;
}
.btn1:hover{
    color: rgb(175, 255, 71);
}
.btn2:hover{
    color: rgb(175, 255, 71);
}
.btn3:hover{
    color: rgb(175, 255, 71);
}
.btn4:hover{
    color: rgb(175, 255, 71);
}
.btn1:hover~.fjt .fmh_pic{
    background-image: url(../img/hu.jpg);
}
.btn2:hover~.fjt .fmh_pic{
    background-image: url(../img/魔方.jpg);
}
.btn3:hover~.fjt .fmh_pic{
    background-image: url(../img/zhu2.jpg);
}
.btn4:hover~.fjt .fmh_pic{
    background-image: url(../img/tsg.jpg);
}
.fmf_txt{
    width: 450px;
    height:625px;
    float: right;
    background-image: url(../img/tfmh.jpg);
    transition: 1s;
}
.btn1:hover~.fjt .fmf_txt{
    background-image: url(../img/tfmh.jpg);
}
.btn2:hover~.fjt .fmf_txt{
    background-image: url(../img/thzy.jpg);
}
.btn3:hover~.fjt .fmf_txt{
    background-image: url(../img/zfsy.jpg);
}
.btn4:hover~.fjt .fmf_txt{
    background-image: url(../img/ggmt.jpg);
}
/* 风景图 */
/* 页面底部 */
.footer{
    float: left;
    width: 100%;
    height: 110px;
    background-color: cornflowerblue;
    text-align: center;
    line-height: 55px;
    color: #333;
    font-size: 15PX;
}
.btlogo{
    float: left;
    margin-left: 10%;
    margin-top: -90px;
    width: 62px;
    height: 80px;
    background: url(../img/logo.png) no-repeat;
    color: blue;
}
